Re: [Qemu-devel] ARM/system mode/stdin

[Christophe LYON]

Hi all,

After more investigation, I am wondering whether there is a conflict 
between 2 entities reading for stdin:
- one is initialized by qemu_chr_open_stdio() (in qemu-char.c)
- the 2nd one is the handling of SYS_READ in arm-semi.c

After some debug/tracing, I have noticed that a few chars a swallowed 
from stdin by calls to stdio_read() because the stdin FD is monitored by 
the select() call in main_loop_wait().

This seems to be in conflict with the ARM semihosting support for 
SYS_READ which also tries to read FD 0.

If I remove the call to
     qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
in qemu_chr_open_stdio() then my sample test works, but I wonder what I 
might have broken?

Thanks and best regards,

Christophe.